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Pyramid pigtoe : ウィキペディア英語版 | Pyramid pigtoe
The pyramid pigtoe, scientific name ''Pleurobema rubrum'', is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is endemic to the United States. Its habitat is in medium to large rivers in sand or gravel. They're generally 4 inches long with a chestnut, thick shell. ==References==
* Bogan, A.E. 1996. (Pleurobema rubrum ). (2006 IUCN Red List of Threatened Species. ) Downloaded on 7 August 2007.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Pyramid pigtoe」の詳細全文を読む
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